You should first check with your supplier. They should be able to tell you which one, then match below. These all include H1N1.
Five brand name-specific Q codes for recipients ages 3 years and older:
• Q2035 - Alfuria Influenza virus vaccine
• Q2036 - Flulaval influenza virus vaccine
• Q2037 - Fluvirin influenza virus vaccine
• Q2038 - Fluzone influenza virus vaccine-we use fluzone and bill Medicare Q2038/G0008/Condition code A6>for UB claims
• Q2039 - Brand name not otherwise specified influenza vaccine